Star-UBB Seminar Series:- Electromagnetically K-mouflaged dark matter and the secret supersymmetry of haloes
The speaker will discuss a cosmological scenario where dark matter is provided with a dark electric charge. This dark electromagnetic sector features a screening mechanism so that all the effects only appear at low redshift when dark matter is sufficiently clustered. Within these models, it is natural to have a universe described by a Lemaitre model instead of a
Friedmann–Lemaître–Robertson–Walker(FLRW). Instead of solving the full relativistic equations, he will consider a Newtonian approach that is sufficient for a matter dominated universe with, possibly, a cosmological constant. In this scenario, it is possible to explain the Hubble tension in terms of the dark electric repulsion between dark matter halos. After reviewing some phenomenological consequences, he will proceed to analyzing the deformability of dark matter haloes due to the dark electromagnetic interaction and show an intriguing resemblance with the vanishing of the Love numbers of black holes. Finally, a remarkable relation with super-symmetric quantum mechanical systems will be explained.
頻道：Zoom ID:853-7454-4159 ←
講者：Dr. Jose Beltran-Jimenez (Departamento de Fısica Fundamental and IUFFyM, Universidad de Salamanca, Salamanca, Spain)
Scientific and Technological Advanced Research- Babeș-Bolyai University(Star-UBB) Seminar Series in Gravitation, Cosmology and Astrophysics
Presently a period of rapid and intense change are being witnessed in our understanding of the gravitational force, at a rate that is quickly increasing since the important observational discoveries of the late 1990s. With the advent of new observational techniques, the emergence of important cosmological and astrophysical paradigms can be seen that lead to a deep change in our understanding of the Universe. Astronomical observations strongly suggest that at large scales the force of gravity may not behave according to standard general relativity, and that a generalization of the gravitational action, either at the geometric level, or at the matter level, may be required for a full understanding of the gravitational interaction.
The goal of the present seminar is to bring Theoretical Gravitational Physics closer to the observations and experiments, and to discuss current topics in general relativity, high-energy physics, astrophysics and cosmology.